TexasCHLforum.com

Why is ZIP code searching difficult? It doesn't look like you're including the zip code, possibly because it's difficult to know what ZIP you're in, but when entering the zip code you can use either Google Maps or Microsoft Virtual Earth web services to do a lookup and you can get the zip from that.

How about Google Earth functionality? You can provide a list of addresses (no ZIP required as long as you have the rest of the info) similar to an RSS feed, and Google Earth can be told to look for and display those addresses as pushpins. Then it doesn't even have to be restricted to a zip code; you can show Google Earth users every posted location in Texas and they can interactively browse their area or wherever they plan to go.